RS-485 wire housing: Molex 5264 (4 pin)
Download this project:
git clone --recursive https://github.com/dukelec/cdstep
CDSTEP is an open-source stepper motor controller that communicates over an RS485 interface.
- Default baud rate: 115200 bps
- Maximum speed: 50 Mbps
- Default address: 0xfe
The underlying protocol is CDBUS, with the following frame format:
src, dst, len, [payload], crc_l, crc_h
Each frame includes a 3-byte header, a variable-length payload, and a 2-byte CRC (identical to Modbus CRC).
For more information on the CDBUS protocol, please refer to:
The payload is encoded using the CDNET protocol. For detailed information, please refer to:
CDBUS GUI Tool: https://github.com/dukelec/cdbus_gui
After power on, first write 1 to state, then write the target position to tc_pos, then the stepper motor will rotate.
After modifying the configuration, write 1 to save_conf to save the configuration to flash.
If you need to restore the default configuration, change magic_code to another value and save it to flash. Then reapply power.
Logs:
Plots:
Plot details, IAP upgrade, data import/export (including registers, logs, plots).